S P E C I F I C A T I O N S

PHOSPHOTUNGSTIC ACID, HYDRATE

Synonyms:				Phosphowolframic Acid; tungstophosphoric Acid

CAS No.:					12501-23-4

Chemical Formula:				H3PO4*12WO3*xH2O

Formula Weight:				2880.17

Appearance:					Off-White to pale yellow crystalline powder,
						Turning yellow on exposure to light

Assay (with Cinchonine):			65.0% to 75.0% 

Insoluble Matter:				0.020% maximum

Chloride (Cl):				0.030% maximum

Nitrate    (NO3):				0.010% maximum

Sulfate    (SO4):				0.020% maximum

Ammonium	(NH4):				0.005% maximum

Heavy Metals (as Pb):			0.005% maximum

Iron (Fe):					0.002% maximum

Effective: 12/30/08